Reel spinning slot machine with superimposed video image

ABSTRACT

A spinning reel slot machine comprises a plurality of mechanical rotatable reels and a video display. In response to a wager, the reels are rotated and stopped to randomly place symbols on the reels in visual association with a display area. The video display provides a video image superimposed upon the reels. The video image may be interactive with the reels and include such graphics as payout values, a pay table, pay lines, bonus game features, special effects, thematic scenery, and instructional information.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.11/607,645, filed Dec. 1, 2006, which is a continuation of U.S. patentapplication Ser. No. 10/321,896, filed Dec. 17, 2002, and issued as U.S.Pat. No. 7,160,187 on Jan. 9, 2007; which is a continuation of U.S.patent application Ser. No. 09/862,574, filed May 22, 2001 and is nowU.S. Pat. No. 6,517,433 issued on Feb. 11, 2003, all of which are herebyincorporated by reference in their entirety.

FIELD OF THE INVENTION

The present invention relates generally to reel spinning slot machinesand, more particularly, to a reel spinning slot machine with a videoimage superimposed upon the mechanical reels of the machine.

BACKGROUND OF THE INVENTION

A reel spinning slot machine generally comprises a plurality ofmechanical rotatable reels controlled by a processor. In response to awager, the processor randomly selects an outcome from a plurality ofpossible outcomes and then causes the reels to be rotated and stopped todisplay the selected outcome. The selected outcome is represented bycertain symbols on the reels being in visual association with a displayarea. If the selected outcome corresponds to a winning outcomeidentified on a pay table, the processor instructs a payoff mechanism toaward a payoff for that winning outcome to the player in the form ofcoins or credits.

Heretofore, the display area of reel spinning slot machines has beenfairly mundane. Any proposals for changing the appearance of the displayarea have been fairly minor and limited in capability. For example, inU.S. Pat. No. 6,056,642 to Bennett, reel symbols are colored bybacklighting the symbols with colored light bulbs or similar means. InU.S. Pat. No. 6,027,115 to Griswold et al., the reels themselves containelectroluminescent elements that define one or more reel symbols, suchas cherries, bars, a number “7,” etc. If multiple electroluminescentelements are provided for a particular symbol, that symbol may bedisplayed in multiple formats. Although the above proposals change theappearance of the display area to some extent, a need exists for aspinning reel slot machine with a structure capable of effecting moreextravagant changes to the appearance of the display area.

SUMMARY OF THE INVENTION

Accordingly, a spinning reel slot machine comprises a plurality ofmechanical rotatable reels and a video display. In response to a wager,the reels are rotated and stopped to randomly place symbols on the reelsin visual association with a display area. The video display provides avideo image superimposed on the reels. The video image may beinteractive with the reels and include such graphics as payout values, apay table, pay lines, bonus game features, special effects, thematicscenery, and instructional information. The present invention isadvantageous in that it is capable of effecting extravagant changes tothe appearance of the display area and displaying the graphics withinthe player's focus (i.e., the mechanical reels).

BRIEF DESCRIPTION OF THE DRAWINGS

The foregoing and other advantages of the invention will become apparentupon reading the following detailed description and upon reference tothe drawings.

FIG. 1 is an isometric view of a spinning reel slot machine embodyingthe present invention.

FIG. 2 a is a side view of the slot machine with portions broken away toreveal internal structure in accordance with a first embodiment of thepresent invention.

FIG. 2 b is a side view of the slot machine with portions broken away toreveal internal structure in accordance with a second embodiment of thepresent invention.

FIGS. 3 through 10 a-c are front views of a display area of the slotmachine with various video images superimposed on the mechanical reels.

FIG. 11 is a block diagram of a control system suitable for operatingthe slot machine.

While the invention is susceptible to various modifications andalternative forms, specific embodiments have been shown by way ofexample in the drawings and will be described in detail herein. Itshould be understood, however, that the invention is not intended to belimited to the particular forms disclosed. Rather, the invention is tocover all modifications, equivalents, and alternatives falling withinthe spirit and scope of the invention as defined by the appended claims.

DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

Turning now to the drawings and referring initially to FIG. 1, aspinning reel slot machine 10 comprises a plurality of mechanicalrotatable reels 12 a, 12 b, 12 c and a video display (see FIGS. 2 a and2 b). In response to a wager, the reels 12 a, 12 b, 12 c are rotated andstopped to randomly place symbols on the reels in visual associationwith a display area 16. Payouts are awarded based on combinations andarrangements of the symbols appearing in the display area 16. The videodisplay provides a video image 18 occupying the display area 16 andsuperimposed on the reels 12 a, 12 b, 12 c. The video image 18 may beinteractive with the reels 12 a, 12 b, 12 c, may be static or dynamic,and may include such graphics as payout values, a pay table, pay lines,bonus game features, special effects, thematic scenery, andinstructional information. In the illustrated embodiment, the slotmachine 10 is an “upright” version in which the display area 16 isoriented vertically relative to the player. Alternatively, the slotmachine 10 may be a “slant-top” version in which the display area 16 isslanted at about a thirty degree angle toward the player of the slotmachine 10.

Referring to FIGS. 2 a and 2 b, the video image 18 in the display area16 may be either a direct image (FIG. 2 a) or a virtual image (FIG. 2b). If the video image 18 is a direct image, as in FIG. 2 a, the directimage is preferably generated by a flat panel transmissive video display14 a positioned in front of the reels 12 a, 12 b, 12 c. The transmissivedisplay 14 a may, for example, be a transmissive liquid crystal display(LCD) commercially available from LG Phillips LCD Co., Ltd., of Seoul,Korea. The transmissive display 14 a may be outfitted with a touchscreen mounted to a front surface of the display 14 a. The touch screencontains soft touch keys denoted by the image on the underlying display14 a and used to operate the slot machine 10.

If the video image 18 is a virtual image, as in FIG. 2 b, the virtualimage is preferably generated by a projection arrangement including avideo display 14 b and a partially reflective mirror 20. The videodisplay 14 b and the partially reflective mirror 20 are relativelypositioned to project the virtual image in front of the reels 12 a, 12b, 12 c between the reels and a player. The video display 14 b ispreferably mounted below the reels 12 a, 12 b, 12 c and is generallyperpendicular to the display area 16. The mirror 20 is preferablymounted in front of the reels 12 a, 12 b, 12 c and is oriented atapproximately a forty-five degree angle relative to both the videodisplay 14 b and the display area 16. The virtual image is generallyparallel to the display area 16 and may, in fact, occupy the displayarea 16. Also, the virtual image may be three-dimensional. In theembodiment of FIG. 2 b, the display area 16 includes a glasscover/window. This cover is optionally outfitted with a touch screenthat contains soft touch keys denoted by the virtual image and used tooperate the slot machine 10.

The video display 14 b in FIG. 2 b may be a CRT, LCD, dot matrix, LED,electro-luminescent, or other type of video display known in the art.Also, instead of mounting the video display 14 b below the reels 12 a,12 b, 12 c, the display 14 b may be mounted above the reels with themirror 20 still oriented at approximately a forty-five degree anglerelative to both the video display 14 b and the display area 16.

Referring back to FIG. 1, the slot machine 10 is operable to play abasic slot game with the three mechanical spinning reels 12 a, 12 b, 12c and a bonus game triggered by a start-bonus outcome in the basic game.The number of mechanical reels may vary, for example, to include one ormore additional reels. The mechanical reels may be mounted to ahorizontal axis to spin vertically as shown or may, alternatively, bemounted to a vertical axis to spin horizontally. Also, instead of eachcolumn of symbols being associated with a single reel, each individualsymbol may associated with a single reel such that a symbol array ofnine symbols is associated with nine distinct reels. Each of five paylines 22 a, 22 b, 22 c, 22 d, 22 e extends through one symbol on each ofthe three mechanical reels. The number of pay lines may be more or lessthan five and may have various configurations.

Generally, game play is initiated by inserting a number of coins orplaying a number of credits, causing a central processing unit toactivate a number of pay lines corresponding to the number of coins orcredits played. As shown in FIG. 3, the superimposed video image 18 maydepict instructional information prompting the player to insert coins orplay credits. The player selects the number of pay lines (between oneand five) to play by pressing a “Select Lines” key on a button panel 24.The player then chooses the number of coins or credits to bet on theselected pay lines by pressing a “Bet Per Line” key on the button panel24. As shown in FIG. 4, the superimposed video image 18 may depict theactivated pay lines and the number of wagered credits per pay line.

After activation of the pay lines, the reels 12 a, 12 b, 12 c may be setin motion by touching a “Spin Reels” key on the button panel 24 or, ifthe player wishes to bet the maximum amount per line, by using a “MaxBet Spin” key on the button panel 24. Alternatively, other mechanismssuch as, for example, a lever may be used to set the reels in motion.The central processing unit uses a random number generator to select agame outcome (e.g., “basic” game outcome) corresponding to a particularset of reel “stop positions.” The central processing unit then causeseach of the mechanical reels to stop at the appropriate stop position.Symbols are printed on the reels to graphically illustrate the reel stoppositions and indicate whether the stop positions of the reels representa winning game outcome.

Winning basic game outcomes (e.g., symbol combinations resulting inpayment of coins or credits) are identifiable to the player by a paytable. As shown in FIG. 5, the superimposed video image 18 may depictthe pay table in response to a command by the player (e.g., by pressinga “Pay Table” key on the button panel 24). A winning basic game outcomeoccurs when the symbols appearing on the reels 12 a, 12 b, 12 c along anactive pay line correspond to one of the winning combinations on the paytable. A winning combination, for example, could be three matchingsymbols along an active pay line. If the displayed symbols stop in awinning combination, the game credits the player an amount correspondingto the award in the pay table for that combination multiplied by theamount of credits bet on the winning pay line. As shown in FIG. 6, thesuperimposed video image 18 may highlight the winning combination(s)(e.g., “7,” “7,” “7”) and its associated pay line (e.g., pay line 22 c)and depict the award for that winning combination. The video image 18may further include special effects such as flashing the winning payline(s) and/or the award and providing explosions. The winning payline(s) may flash, be accompanied by exploding flashes, and display aportion of the pay table. The player may collect the amount ofaccumulated credits by pressing a “Collect” key on the button panel 24.In one implementation, the winning combinations start from the firstreel 12 a (left to right) and span adjacent reels. In an alternativeimplementation, the winning combinations start from either the firstreel 12 a (left to right) or the third reel 12 c (right to left) andspan adjacent reels.

If the display area 16 includes a touch screen mounted to either thetransmissive display 14 a in the direct image embodiment of FIG. 2 a orthe glass cover in the virtual image embodiment of FIG. 2 b, the videoimage 18 may duplicate some or all of the aforementioned keys on thebutton panel 24 as touch keys 26 as shown in various Figures. A playercan then enable a desired function either by touching the touch screenat an appropriate touch key 26 denoted by the video image 18 or bypressing an appropriate key on the button panel 24.

Included among the plurality of basic game outcomes is a start-bonusoutcome for triggering play of a bonus game. A start-bonus outcome maybe defined in a number of ways. For example, a start-bonus outcome mayoccur when a special start-bonus symbol or a special combination ofsymbols appears on one or more of the reels 12 a, 12 b, 12 c. Thestart-bonus outcome may require the combination of symbols to appearalong an active pay line or may, alternatively, require that thecombination of symbols appear anywhere on the display, regardless ofwhether the symbols are along an active pay line. The appearance of astart-bonus outcome causes the central processing unit to shiftoperation from the basic slot game to the bonus game.

As shown in FIG. 7, the video image 18 may depict the bonus game and anybonuses resulting therefrom. The bonus game may, for example, includefree spins of a new set of video reels included in the video image 18.Winning combinations on the video reels may be defined by the same paytable as used for the mechanical reels or a different pay tablealtogether. The bonus game may be interactive and require a player toselect one or more selectable elements 28 to earn bonuses. Also, thebonus game may depict one or more animated events and award bonusesbased on an outcome of the animated events. Furthermore, the bonus gamemay be depicted by the video image 18 alone or in conjunction with avideo image depicted on an optional secondary video display 40 (see FIG.1). The two video images may be linked to appear like one unified image.Upon completion of the bonus game, the central processing unit shiftsoperation back to the basic slot game.

As shown in FIGS. 8 a-c, 9 a-c, and 10 a-c, the video image 18 may beused to modify one or more symbols printed on one or more of the stoppedmechanical reels 12 a, 12 b, 12 c. For example, in response to apredetermined random or non-random event, the video image 18 maytransform a reel symbol into a different symbol, such as a symbol neededto complete a winning combination. The different symbol is generated bythe video image 18. In FIGS. 8 a-c, the video image 18 depicts ananimation transforming (e.g., “morphing”) a blank symbol on mechanicalreel 12 b into a BELL symbol to form a winning combination of three BELLsymbols along pay line 22 c. In addition, referring to FIGS. 9 a-c, inresponse to a predetermined random or non-random event, the video image18 may depict an animation in which a video indicator 29 is moved from aperiphery of the display area (e.g., a corner of the display area awayfrom the mechanical reels) to one or more of the symbols on the reels.The moving indicator 29 may identify the reel symbols to which it movesas a special symbol to be evaluated as, for example, a wild symbol or ascatter pay symbol. In FIGS. 10 a-c, a video indicator 29 has moved to aCHERRY symbol on mechanical reel 12 c. If the CHERRY symbol is therebydesignated a wild symbol, the displayed symbol array includes a winningcombination of three MELON symbols along pay line 22 c where one of thethree MELON symbols is formed by the wild symbol. Further, in FIGS. 10a-c, the video image 18 depicts an animation transforming a BELL symbolon reel 12 c into a SEVEN symbol to form a winning combination of threeSEVEN symbols along pay line 22 c. The replacement SEVEN symbolgenerated by the video image 18 is sufficiently opaque or translucent tosubstantially cover the BELL symbol printed on mechanical reel 12 c.

The slot machine is preferably designed to adjust the appearance of thevideo image 18 in terms of transparency, translucency, or opacitydepending on the purpose of the video image 18. On the one hand, topermit clear viewing of the mechanical 10 reels 12 a, 12 b, 12 cunderlying the video image 18, the portion of the video image 18directly overlying the reels is made more transparent.

On the other hand, to facilitate viewing of the video image 18 withoutvisual interference from the underlying mechanical reels, the videoimage 18 is made more opaque through proper selection of colors andtheir level of brightness. Also, to as accentuate the video image 18relative to the underlying reels following a reel spin, any lampsilluminating the reels during a reel spin may be turned off or dimmedfollowing the reel spin. In addition, if the reels include blank symbols(e.g., solid white areas), any video graphics over such blank symbolswill be readily visible. Similarly, any video graphics alongside, justabove, or just below the underlying reels will be readily visible.Further, in the direct image embodiment of FIG. 2 a, the transmissivevideo display 14 a may be backed by an extendable opaque shade duringthe bonus game. The shade is retracted from the display area 16 duringthe basic slot game. When the central processing unit shifts operationfrom the basic slot game to the bonus game, the shade extends throughthe display area to separate the transmissive video display 14 a fromthe underlying reels and thereby completely shield the underlying reels.

FIG. 11 is a block diagram of a control system suitable for operatingthe slot machine. The control system includes a central processing unitwith a microcontroller 30 and system memory 32. The memory 32 preferablycomprises a separate read-only memory (ROM) and battery-backedrandom-access memory (RAM). It will be appreciated, however, that thesystem memory 32 may be implemented on any of several alternative typesof memory structures or may be implemented on a single memory structure.For example, the read-only memory may be replaced or supplemented with amass storage unit such as a removable flash memory or a hard drive. Thesystem memory is used to store game-related data associated with thechance games played on the slot machine. The game-related data may, forexample, include game code, math tables, a random number generator,audio resources, and video resources. The player may select an amount towager and other game play functions via the touch screen keys 26 (ifprovided) or button panel 24. The wager amount is signaled to themicrocontroller 30 by a coin/credit detector 34. In response to thewager, the microcontroller 30 executes the game code which, based on arandomly selected outcome, rotates and stops the mechanical reels 12 a,12 b, 12 c at the selected outcome. Also, the microcontroller 30selectively accesses the video resources to be included in the videoimage 18 provided by the video display 14 a (FIG. 2 a) or 14 b (FIG. 2b) and the audio resources to be played through one or more audiospeakers 36 mounted to a housing of the slot machine. If the outcomecorresponds to a winning outcome identified on the pay table, themicrocontroller 30 instructs a payoff mechanism 38 to award a payoff forthat winning outcome to the player in the form of coins or credits.

While the present invention has been described with reference to one ormore particular embodiments, those skilled in the art will recognizethat many changes may be made thereto without departing from the spiritand scope of the present invention. For example, instead of the videoimage 18 depicting a bonus game triggered by a start-bonus outcome onthe mechanical slot reels 12 a, 12 b, 12 c, the roles of the video image18 and the slot reels may be reversed. The video image 18 may depict abasic game including a start-bonus outcome for triggering a bonus gameinvolving spins of the slot reels. Each of these embodiments and obviousvariations thereof is contemplated as falling within the spirit andscope of the claimed invention, which is set forth in the followingclaims.

1. A spinning reel slot machine for conducting a wagering game,comprising: a plurality of mechanical rotatable reels that, in responseto a wager, are rotated and stopped to place symbols on the reels invisual association with a display area, the displayed symbols indicatinga randomly selected outcome of the wagering game; and a video displayproviding a video images overlaying the reels such that the video imagesare disposed in front of the reels between the reels and a player of theslot machine, a first set of the video images interacting with thesymbols on the reels and a second set of the video images presenting aspecial event of the wagering game, the special event including one ormore game indicia selectable by the player.
 2. The slot machine of claim1, wherein the special event is animated and provides awards based on anoutcome of the special event.
 3. The slot machine of claim 1, furtherincluding a secondary video display, the special event being presentedby the second set of the video images in conjunction with another videoimage on the secondary video display.
 4. The slot machine of claim 1,wherein the video display presents the special event in response to therandomly selected outcome being an event-triggering outcome.
 5. The slotmachine of claim 1, further including a controller operative to providebonuses based on the selection of the game indicia.
 6. The slot machineof claim 1, wherein the video images are a virtual images.
 7. The slotmachine of claim 6, further including a partially reflective mirroroverlaying one or more of the reels, the video display and the partiallyreflective mirror being relatively positioned to project the virtualimages in front of the reels between the reels and the player.
 8. Theslot machine of claim 1, wherein the video images are adjustable interms of opacity, translucency, and transparency.
 9. The spinning reelslot machine of claim 1, wherein the wagering game includes a first gamesegment played in a first game format using the plurality of reels and asecond game segment played in a second game format different from thefirst game format, the second game format using the second set of thevideo images and being initiated by a trigger condition during the firstgame segment.
 10. The spinning reel slot machine of claim 9, wherein thefirst game format includes the first set of the video images interactingwith the symbols on the reels and wherein the second game formatincludes the second set of the video images presenting the special eventof the wagering game and one or more game indicia selectable by theplayer.
 11. The spinning reel slot machine of claim 10, wherein thespecial event is free of reels and reel symbols.
 12. A method ofconducting a wagering game on a spinning reel slot machine, comprising:receiving a wager; rotating and stopping a plurality of mechanicalrotatable reels to place symbols on the reels in visual association witha display area, the displayed symbols indicating a randomly selectedoutcome of the wagering game; displaying a first set of video imagesoverlaying the reels such that the first set of the video images aredisposed in front of the reels between the reels and a player of theslot machine, the first set of video images interacting with the symbolson the reels; and presenting a special event of the wagering game on asecond set of the video images, the special event including one or moreindicia within the second set of video images selectable by the player.13. The method of claim 12, wherein the special event is animated, andthe method further including providing an award based on an outcome ofthe special event.
 14. The method of claim 12, wherein the presentingincludes presenting the special event on the second set of the videoimages in conjunction with another video image on a secondary videodisplay.
 15. The method of claim 12, wherein the presenting is inresponse to the randomly selected outcome being an event-triggeringoutcome.
 16. The method of claim 12, further including receiving aselection by the player of at least one of the one or more indicia, andproviding an award based on the selection.
 17. The method of claim 12,wherein the sets of video images are a virtual images.
 18. The method ofclaim 17, wherein the sets of video images are provided by a videodisplay, and wherein the displaying includes projecting the virtualimages in front of the reels between the reels and the player byrelative positioning of the video display and a partially reflectivemirror overlaying one or more of the reels.